We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome,
Firefox,
Internet Explorer 11,
Safari. Thank you!

Net connections for unused GTX transceivers.

I am designing a carrier card for the PicoZed 7030. The design will not make use of the GTX transceivers at all. From table 5-6 of UG476, I understand that the following connections should be made for the unused transceivers:

MGTAVCC -> GNDMGTAVTT -> GND

MGTVCCAUX -> GND

MGTREFCLKP/MGTREFCLKN -> Open

MGTRXP/MGTRXN -> GND

MGTTXP/MGTTXN -> Open

MGTRREF -> GND

Three questions:

Can anyone verify that this is correct?

MGTVCCAUX is already connected to 1.8V on the PicoZed. Is there any reason to not leave this connected as is?

Is there anything on the PicoZed other than the transceivers that use MGTREFCLKP/N, MGTAVCC, and MGTAVTT? It would be a shame to make these boards and find out that the ethernet controller doesn't work.

Re: Net connections for unused GTX transceivers.

If your board already has power to the MGT, then it's best to leave it. Unused MGTs won't use much power. The best recommendation is to treat this as a partially unused GTX quad, so just ground the unused MGTRXP/MGTRXN inputs.

Re: Net connections for unused GTX transceivers.

If your board already has power to the MGT, then it's best to leave it. Unused MGTs won't use much power. The best recommendation is to treat this as a partially unused GTX quad, so just ground the unused MGTRXP/MGTRXN inputs.